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Command: learp | Section: 8 | Source: Digital UNIX | File: learp.8.gz
learp(8) System Manager's Manual learp(8)
NAME
learp - Displays the contents of a LAN-Emulation Address Resolution
Protocol (LE-ARP) table.
SYNOPSIS
/usr/sbin/learp [-u unit number] -a
FLAGS
Specifies a LE-ARP cache. The unit number is the same as is displayed
by the netstat -i command. For example: elan0 is unit 0, elan1 is unit
1, and so on.
If the -u flag is not specified, the default unit number is 0.
Displays all entries in the LAN-Emulation Address Resolution
Protocol (LE-ARP) table.
DESCRIPTION
Each LAN-Emulation Client interface (displayed as elann in netstat out-
put) has an Address Resolution Protocol (LE-ARP) table that contains
mappings of 6-byte medium access control (MAC) addresses to 20-byte
Asynchronous Transfer Mode (ATM) addresses. The learp command displays
the contents of the LE-ARP table.
Each LE-ARP table entry contains the following information: Each MAC
address that has been or is being contacted through the ATM-emulated
LAN. One of the following state values: AP - LE-ARP is pending. The
ATM address associated with the MAC address is not known. VP - Virtual
Channel (VC) setup is pending. The ATM address is known, but no VC is
established with the remote node. FL - Flush is pending. A new VC has
been established with the remote node and the broadcast channel is be-
ing flushed so packets flowing on the new VC will not arrive out of or-
der. FD - Forward Direct. Packets flowing to the destination are us-
ing the data-direct VC. If known, the 20-byte ATM address associated
with the MAC address. One of the following flags: R - Remote entry.
The MAC address is on a legacy (i.e. ethernet) network on the back side
of an ATM edge device. P - Permanent entry. The LE-ARP entry is per-
manent. If known, this is the Virtual Path Identifier (VPI) and the
Virtual Channel Identifier (VCI) of the data-direct VC used by packets
destined to the MAC address. Many MAC addresses may use the same VC.
EXAMPLES
The following example shows the output of a learp -a command in which
the LE-ARP cache contains five entries: # learp -a le-arp cache con-
tains 5 entries.
MAC Address State ATM Address Flags
VPI/VCI 08-00-2b-01-01-01 (AP) pending 08-00-2b-01-01-02 (VP)
39000000000000000000000000.08002b010102.00 pending
08-00-2b-01-02-02 (FL) 39000000000000000000000000.08002b010203.00 R
0/65 08-00-2b-01-02-03 (FD) 39000000000000000000000000.08002b010203.00
0/65
RELATED INFORMATION
Commands: atmelan(8), atmconfig(8), atmsig(8). delim off
learp(8)